<?php
namespace phpzip;
# 
# PHPZip v1.2 by Sext (sext@neud.net) 2002-11-18
#   (Changed: 2003-03-01)
# 
# Makes zip archive
#
# Based on "Zip file creation class", uses zLib
#
#
 
class PHPZIP{
	/**
		压缩ZIP文件
		@$FileList 		文件列表（array），只能压缩文件
		@$zipfilename	要保存到的zip文件路径，如：C:\123.zip
        @$FileListname   为依次对应$FileList文件列表的文件名(array),就是懒得改写$FileList,所以就直接增加一个变量
	*/
	function Zip($FileList, $zipfilename,$FileListname){
		if (@function_exists('gzcompress')){
			$curdir = getcwd();
			if (is_array($FileList)){	//如果是文件列表
				$filelist = $FileList;
			}else{
				$filelist = $this -> GetFileList($FileList);
			}
			
			if ((!empty($FileList)) && (!is_array($FileList)) && (file_exists($FileList))){	//单个文件
				chdir($FileList);
			}else{
				chdir($curdir);
			}
 
			if (count($filelist)>0){
				foreach($filelist as $key=>$filename){
					if (is_file($filename)){
						$fd = fopen ($filename, "r");
						$content = fread ($fd, filesize ($filename));
						fclose ($fd);
						if (is_array($FileList)) $filename = basename($filename);
						
						$filename = $FileListname[$key];
						
						$filename = iconv("UTF-8","GBK",$filename);
						
					//	因为中文名问题,所以进行修改编码
						
						
						$this -> addFile($content, $filename);
					}
				}
				$out = $this -> file();
				chdir($curdir);
				$fp = fopen($zipfilename, "w");
				fwrite($fp, $out, strlen($out));
				fclose($fp);
			}
			return 1;
		}else{
			return 0;
		}
	}
 
	function GetFileList($dir){
		if (file_exists($dir)){
			echo $dir;
			$args = func_get_args();
			$pref = $args[1];
			$dh = opendir($dir);
			while($files = readdir($dh)){
				if (($files!=".")&&($files!="..")){
					if (is_dir($dir.$files)){
						$curdir = getcwd();
						chdir($dir.$files);
						$file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
						chdir($curdir);
					}
					else $file[]=$pref.$files;
				}
			}
			closedir($dh);
		}
		
		
		return $file;
	}
 
	var $datasec      = array();
	var $ctrl_dir     = array();
	var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
	var $old_offset   = 0;
 
	/**
	一个Unix时间戳转换成一个4字节的DOS日期和时间格式（日高两个字节，时间允许大小比较低两个字节）
	@param integer 	当前的Unix时间戳
	@return integer 一个4字节的DOS格式的当前日期
	@access private
	*/
	function unix2DosTime($unixtime = 0) {
		$timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
		if ($timearray['year'] < 1980) {
			$timearray['year']    = 1980;
			$timearray['mon']     = 1;
			$timearray['mday']    = 1;
			$timearray['hours']   = 0;
			$timearray['minutes'] = 0;
			$timearray['seconds'] = 0;
		}
		return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
		($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
	}
 
 
/**
	添加压缩文件
	@param string   文件的内容
	@param string   在归档文件中的文件名称（可包含路径）
	@param integer 	当前的时间戳
*/
 
	function addFile($data, $name, $time = 0){
		
		
		$name     = str_replace('\\', '/', $name);
 
		$dtime    = dechex($this->unix2DosTime($time));
		$hexdtime = '\x' . $dtime[6] . $dtime[7]
		. '\x' . $dtime[4] . $dtime[5]
		. '\x' . $dtime[2] . $dtime[3]
		. '\x' . $dtime[0] . $dtime[1];
		eval('$hexdtime = "' . $hexdtime . '";');
 
		$fr   = "\x50\x4b\x03\x04";
		$fr   .= "\x14\x00";            // ver needed to extract
		$fr   .= "\x00\x00";            // gen purpose bit flag
		$fr   .= "\x08\x00";            // compression method
		$fr   .= $hexdtime;             // last mod time and date
 
		// "local file header" segment
		$unc_len = strlen($data);
		$crc     = crc32($data);
		$zdata   = gzcompress($data);
		$c_len   = strlen($zdata);
		$zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
		$fr      .= pack('V', $crc);             // crc32
		$fr      .= pack('V', $c_len);           // compressed filesize
		$fr      .= pack('V', $unc_len);         // uncompressed filesize
		$fr      .= pack('v', strlen($name));    // length of filename
		$fr      .= pack('v', 0);                // extra field length
		$fr      .= $name;
 
		// "file data" segment
		$fr .= $zdata;
 
		// "data descriptor" segment (optional but necessary if archive is not
		// served as file)
		$fr .= pack('V', $crc);                 // crc32
		$fr .= pack('V', $c_len);               // compressed filesize
		$fr .= pack('V', $unc_len);             // uncompressed filesize
 
		// add this entry to array
		$this -> datasec[] = $fr;
		$new_offset        = strlen(implode('', $this->datasec));
 
		// now add to central directory record
		$cdrec = "\x50\x4b\x01\x02";
		$cdrec .= "\x00\x00";                // version made by
		$cdrec .= "\x14\x00";                // version needed to extract
		$cdrec .= "\x00\x00";                // gen purpose bit flag
		$cdrec .= "\x08\x00";                // compression method
		$cdrec .= $hexdtime;                 // last mod time & date
		$cdrec .= pack('V', $crc);           // crc32
		$cdrec .= pack('V', $c_len);         // compressed filesize
		$cdrec .= pack('V', $unc_len);       // uncompressed filesize
		$cdrec .= pack('v', strlen($name) ); // length of filename
		$cdrec .= pack('v', 0 );             // extra field length
		$cdrec .= pack('v', 0 );             // file comment length
		$cdrec .= pack('v', 0 );             // disk number start
		$cdrec .= pack('v', 0 );             // internal file attributes
		$cdrec .= pack('V', 32 );            // external file attributes - 'archive' bit set
		$cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
		$this -> old_offset = $new_offset;
		$cdrec .= $name;
		$this -> ctrl_dir[] = $cdrec;
	}
 
 
/**
	文件印出来
	@return 字符串的压缩文件
*/
	function file(){
		$data    = implode('', $this -> datasec);
		$ctrldir = implode('', $this -> ctrl_dir);
		return $data.$ctrldir.$this -> eof_ctrl_dir.
		pack('v', sizeof($this -> ctrl_dir)). // total # of entries "on this disk"
		pack('v', sizeof($this -> ctrl_dir)). // total # of entries overall
		pack('V', strlen($ctrldir)).           // size of central dir
		pack('V', strlen($data)).              // offset to start of central dir
		"\x00\x00";                             // .zip file comment length
	}
}
 
?>
